JP6258844B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine including a wireless authentication device that performs wireless authentication with a portable key (portable machine).

  In general, a hydraulic excavator as a typical example of a construction machine has a hydraulic actuator (for example, a hydraulic cylinder of a working device, a traveling hydraulic motor of a lower traveling body, a swinging hydraulic motor of an upper swinging body) on the side of the entrance to the driver's seat. A gate lock lever that can be switched between a lock position that prohibits driving and a lock release position that permits driving of the hydraulic actuator is provided (Patent Document 1). The operator operates the gate lock lever to the raised position that is the locked position and the lowered position that is the unlocked position.

  For example, when the operator gets on the driver's seat of the excavator or gets off the driver's seat, the operator raises the gate lock lever to the lock position (raised position). On the other hand, when driving (steering) the hydraulic excavator in the driver's seat, the gate lock lever is lowered to the unlock position (lower position). Here, the gate lock lever is provided with a lock switch.

  When the gate lock lever is set to the lock position, the lock switch is turned OFF, and the valve device for switching supply / discharge of pressure oil to / from the pilot operation system is switched to the shut-off position (discharge position). In this case, the stop of the hydraulic actuator is maintained, and the operation of the work device, the turning operation of the upper turning body, and the running operation of the lower traveling body are disabled. On the other hand, when the gate lock lever is set to the unlock position, the lock switch is turned ON, and the valve device is switched to the supply position. In this case, the hydraulic actuator is driven according to the operation of the operator, and the operation of the working device, the turning operation of the upper turning body, and the running operation of the lower traveling body are possible.

JP 2006-28798 A

  By the way, according to the prior art, when the operator leaves the hydraulic excavator while driving the engine, there is a possibility that a person (other person) other than the operator (person) moves the hydraulic excavator. That is, even if a person other than the operator gets on the hydraulic excavator that is driving the engine and lowers the gate lock lever to the unlock position (lower position), the drive of the hydraulic actuator is permitted. At this time, if the person (other person) touches the operation lever, the excavator may move.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a construction machine capable of suppressing the movement of others other than the operator even while the prime mover is driven.

Construction machine of the present invention includes a body having a luck Utateseki, a prime mover as a power source provided on the vehicle body, a hydraulic pump for supplying hydraulic oil is driven by the prime mover, hydraulic fluid supplied from said hydraulic pump obtain Bei a hydraulic actuator driven, a front Symbol lock is switched on and an unlocked position to allow the drive and locking position of the hydraulic actuator to prohibit driving of the hydraulic actuator device by.

In order to solve the above-described problems, the configuration of the present invention employs a wireless authentication device that performs wireless authentication between an activation switch that starts the prime mover and a portable key provided in the vehicle body. , based on the authentication by the operation with the wireless authentication device of the start switch, and a vehicle body controller for starting of the prime mover, the vehicle body controller, the prime mover is being driven, the locking device prior km Tsu state is switched to Unlock position, and wherein when the portable key is within the authentication range of the wireless authentication device, permits the driving of the hydraulic actuator, the prime mover is being driven, the lock even when the device is switched to the unlocked position, when the mobile key is out of the authentication range of the wireless authentication device drives said prime mover On purpose the certain to make prohibit driving of the hydraulic actuator while.

  ADVANTAGE OF THE INVENTION According to this invention, even if a motor | power_engine is driving, it can suppress that an operator other than the operator moves a construction machine by having a portable key.

It is a front view showing a hydraulic excavator according to an embodiment. It is a top view of a hydraulic excavator. It is sectional drawing seen from the arrow III-III direction in FIG. It is a hydraulic circuit block diagram of a hydraulic excavator. It is an electric circuit block diagram of a hydraulic excavator. It is explanatory drawing which shows the relationship of transmission and reception with the portable key which an operator has, and the transmission antenna and receiving antenna by the side of a hydraulic shovel. It is a flowchart which shows the control processing by the vehicle body controller in FIG. It is a flowchart which shows the setting process of an authentication range. It is explanatory drawing which shows an example of the setting of an authentication range as a list. It is a front view which shows the hydraulic shovel by the 1st modification. It is a top view of a hydraulic excavator. It is a front view which shows the hydraulic shovel by the 2nd modification.

  Hereinafter, a construction machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where the construction machine is applied to a small hydraulic excavator called a mini excavator.

  1 to 9 show an embodiment. In FIG. 1, a hydraulic excavator 1 as a construction machine is a small hydraulic excavator called a mini excavator suitable for work in a narrow work site. The hydraulic excavator 1 is a self-propelled crawler-type lower traveling body 2 and is mounted on the lower traveling body 2 through a turning device 3 so as to be capable of turning. 4 and a working device 5 attached to the front side of the upper swing body 4 so as to be able to move up and down. The excavator 1 performs excavation work of earth and sand using the working device 5.

  Here, the lower traveling body 2 includes a track frame 2A, drive wheels 2B provided on the left and right sides of the track frame 2A, and drive wheels 2B on the left and right sides of the track frame 2A. It comprises an idler wheel 2C provided on the opposite side, a drive wheel 2B and a crawler belt 2D wound around the idler wheel 2C. The left and right drive wheels 2B are rotationally driven by left and right traveling hydraulic motors 2E and 2F (see FIG. 4) as hydraulic actuators, respectively.

  The working device 5 is configured as, for example, a swing post type working device. The work device 5 includes a swing post 5A, a boom 5B, an arm 5C, and a bucket 5D as a work tool. In addition, the working device 5 includes a swing cylinder 5E (see FIG. 2) that swings the swing post 5A (and thus the entire working device 5) left and right, a boom cylinder 5F that rotates the boom 5B, and an arm 5C. Arm cylinder 5G that rotates and bucket cylinder 5H as a work tool cylinder that rotates (actuates) bucket 5D. The swing cylinder 5E, the boom cylinder 5F, the arm cylinder 5G, and the bucket cylinder 5H are hydraulic actuators that are driven (operated) by pressure oil.

  On the other hand, the upper swing body 4 is attached to the lower traveling body 2 via a swing device 3 including a swing hydraulic motor 3A (see FIG. 4) as a hydraulic actuator, a speed reduction mechanism, a swing bearing and the like. The upper turning body 4 is driven to turn with respect to the lower traveling body 2 by the turning device 3 (the turning hydraulic motor 3A). Here, the upper swing body 4 includes a swing frame 6, an exterior cover 7, a cab 8, and a counterweight 14 which will be described later.

  The turning frame 6 is a frame that forms a support structure of the upper turning body 4, and the turning frame 6 is mounted on the lower traveling body 2 via the turning device 3. The revolving frame 6 is provided with a counterweight 14 and an engine 15 which will be described later on the rear side, a cab 8 which will be described later on the left front side, and a fuel tank (not shown) on the right front side. . The revolving frame 6 is provided with an exterior cover 7 from the right side of the cab 8 to the rear side and the left and right side surfaces. The exterior cover 7 defines a space (engine room) that houses the engine 15, the hydraulic pump 21, a heat exchanger (not shown) and the like together with the revolving frame 6, the cab 8 and the counterweight 14.

  The cab 8 is mounted on the left front side of the revolving frame 6, and the cab 8 defines an operator cab 8 </ b> A in which an operator (driver) rides. Inside the cab 8 is provided a driver's seat 9 on which an operator is seated (sitting). The driver's seat 9 is covered with a cab 8 as a building. Here, on the left and right sides of the driver's seat 9, operation levers 10 </ b> A and 10 </ b> B for operating the work device 5 and the like are provided.

  The operation levers 10A and 10B are tilted in the forward and backward directions and in the left and right directions by the operator. In this case, the left operation lever 10A is, for example, for turning the upper swing body 4 or turning the arm 5C of the work device 5, and the right operation lever 10B is, for example, the boom 5B of the work device 5. Is moved up and down, or the bucket 5D is rotated.

  In front of the driver's seat 9, operating levers and pedals 11 </ b> A and 11 </ b> B for traveling that are operated by manual operation or stepping operation when traveling the lower traveling body 2 are provided. The operation levers / pedals 11A and 11B are tilted forward and backward by an operator to bend the vehicle body forward, backward, left and right.

  An activation switch 12 is provided in the vicinity of the driver's seat 9, more specifically, on the right side of the driver's seat 9 and on the rear side of the right operation lever 10B. The start switch 12 serves as a switch for starting the engine 15, and is constituted by, for example, a push-type switch and operated (pressed) by an operator. As shown in FIG. 5, the start switch 12 is connected to a vehicle body controller 48 described later, and outputs a signal (ON signal) to that effect to the vehicle body controller 48 when operated (pressed) by the operator. The operator can start and stop the engine 15, which will be described later, by sitting in the driver's seat 9 and operating (pushing) the start switch 12.

  On the other hand, on the left side of the driver's seat 9, more specifically, on the lower side of the left operation lever 10 </ b> A, at a position corresponding to the entrance / exit of the cab 8, a lock lever that constitutes a lock device together with a pilot switching valve 28 and the like described later. (Gate lock lever) 13 is provided. The lock lever 13 is rotationally displaced between a boarding / alighting restriction position (hereinafter referred to as a lock release position) that blocks the boarding / alighting opening of the cab 8 and a boarding / alighting permission position (hereinafter referred to as a lock position) that opens the boarding / alighting opening. is there. Here, the unlocking position for blocking the entrance / exit corresponds to the state where the lock lever 13 is lowered, and the lock position where the entrance / exit is opened corresponds to the state where the lock lever 13 is raised. FIG. 1 shows the lock lever 13 in a lowered state (lock release position).

  The lock lever 13 is switched between a lock position (up position) and a lock release position (down position) by an operator's operation. In this case, when the lock lever 13 is set to the lock position, the hydraulic actuators of the excavator 1, that is, various hydraulic actuators such as the cylinders 5E, 5F, 5G, 5H, the traveling hydraulic motors 2E, 2F, the swing hydraulic motor 3A, etc. Driving is prohibited. On the other hand, when the lock lever 13 is set to the unlock position, driving of the hydraulic actuator is permitted.

  Here, the lock lever 13 is provided with a lock switch 13A (see FIG. 5). The lock switch 13A detects the position of the lock lever 13 (detection means). As shown in FIG. 5, the lock switch 13A is connected to a vehicle body controller 48 described later. The vehicle body controller 48 can determine whether the lock lever 13 is in the lock position or the unlock position based on the detection signal (ON / OFF signal) of the lock switch 13A. In this case, the lock switch 13A is, for example, a normally open switch that is energized OFF (open) when the lock lever 13 is in the locked position and is energized ON (closed) when the lock lever 13 is in the unlocked position. A switch that is biased to an open position by a spring).

  Furthermore, as shown in FIG. 5, the vehicle body controller 48 is connected to a pilot cut relay 42 (hereinafter referred to as a PC relay 42) which will be described later. In this case, a battery 31 and a pilot switching valve 28, which will be described later, are connected via a PC relay 42. The PC relay 42, the pilot switching valve 28, and the vehicle body controller 48 together with the lock lever 13 and the lock switch 13A constitute a lock device.

  As will be described later, when the lock lever 13 is set to the locked position, the pilot pressure (switching signal) for switching the control valve device 26 (control valves 26A to 26F) shown in FIG. The valve device 26 is maintained in a neutral state. As a result, the pressure oil discharged from the hydraulic pump 21 returns to the hydraulic oil tank 22 without being supplied to the hydraulic actuator, and the drive of the hydraulic actuator is prohibited.

  On the other hand, when the lock lever 13 is set to the unlocked position, the pilot pressure is supplied to the control valve device 26 (control valves 26A to 26F) via the operation levers 10A and 10B for operation and the operation levers and pedals 11A and 11B for traveling. Ready to supply. In this case, the control valve device 26 is switched (the spool is displaced) based on the operation of the operation levers 10A and 10B and the travel operation levers and pedals 11A and 11B by the operator, and the drive of the hydraulic actuator is permitted. . Thus, the hydraulic excavator 1 performs work by driving the hydraulic actuator while the lock lever 13 is switched to the unlocked position.

  The counterweight 14 balances the weight with the work device 5. The counterweight 14 is located on the rear side of the engine 15 described later and is attached to the rear end portion of the turning frame 6. The rear surface side of the counterweight 14 is formed in an arc shape and is configured to fit the counterweight 14 within the vehicle body width of the lower traveling body 2.

  The engine 15 as a prime mover is provided on the upper swing body 4 (vehicle body). Specifically, the engine 15 is disposed in a horizontally placed state on the rear side of the turning frame 6 constituting the upper turning body 4. The engine 15 is configured using, for example, a small diesel engine, and serves as a power source (drive source) for a hydraulic pump 21 described later. Here, the engine 15 is composed of an electronically controlled engine. For example, the amount of fuel supplied is variably controlled by a fuel injection device such as an electronically controlled injection valve (injector). That is, the fuel injection device is configured to inject an amount of fuel (fuel) injected into a cylinder (not shown) of the engine 15 based on a control signal output from an engine control unit (ECU) 43 (see FIG. 5) described later. The injection amount is controlled variably.

  The engine 15 is provided with an electrical component (auxiliary device) of the engine 15, that is, a starter motor 16 (see FIGS. 4 and 5) serving as an electrical device of the engine 15. As shown in FIG. 5, the starter motor 16 is connected to the battery 31 via a starter relay 33 described later. The starter motor 16 rotates the crankshaft of the engine 15 when the engine 15 is started. That is, when the starter relay 33 is turned on (closed), the starter motor 16 rotates based on the supply (power supply) of power from the battery 31, and the engine 15 can be started. When the engine 15 is started, the starter relay 33 is turned off (opened), and the starter motor 16 is stopped.

  Next, the configuration of the hydraulic circuit of the hydraulic excavator 1 will be described with reference to FIG. In FIG. 4, the hydraulic circuit relating to the swing cylinder 5E is omitted.

  The hydraulic pump 21 is attached to the left side of the engine 15. The hydraulic pump 21 constitutes a hydraulic pressure source together with the hydraulic oil tank 22. That is, the hydraulic pump 21 is driven by the engine 15 to suck in the working oil from the working oil tank 22 and supply (discharge) the sucked working oil to the control valve device 26 through the main pipeline 23. The hydraulic pump 21 is constituted by, for example, a variable displacement swash plate type, a swash shaft type, or a radial piston type hydraulic pump. The hydraulic pump 21 is not necessarily limited to a variable displacement hydraulic pump, and may be configured using, for example, a fixed displacement hydraulic pump.

  The pilot hydraulic pump 24 serves as a pilot hydraulic pressure source and supplies pilot pressure to the pilot line 25. A pilot switching valve 28 is provided in the middle of the pilot line 25.

  The control valve device 26 is configured as an assembly of the control valves 26 </ b> A to 26 </ b> F, and is connected to the discharge side of the hydraulic pump 21 through the main pipeline 23. Each control valve 26A-26F is comprised, for example by the hydraulic pilot type spool valve. The control valve device 26 (control valves 26A to 26F) is provided with a pilot pressure based on the operation of the operation levers 10A and 10B for operation and the operation levers and pedals 11A and 11B for traveling, that is, hydraulic pilot valves 27 and 27 described later. It is switched according to the pilot pressure input to the hydraulic pilot unit. Thereby, the control valve device 26 selectively uses the pressure oil discharged from the hydraulic pump 21 to various hydraulic actuators such as the cylinders 5E, 5F, 5G, and 5H, the traveling hydraulic motors 2E and 2F, and the swing hydraulic motor 3A. Supply / discharge (supply or discharge). The hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F and 3A are driven by pressure oil supplied from the hydraulic pump 21 via the control valve device 26.

  Here, as shown in FIG. 4, the control valve device 26 controls the swing control valve 26A that controls the swing hydraulic motor 3A of the swing device, and the arm cylinder 5G, the boom cylinder 5F, and the bucket cylinder 5H of the work device 5. The arm control valve 26B, the boom control valve 26C, the bucket control valve 26D, and the left traveling control valve 26E and the right traveling control valve 26F that control the traveling hydraulic motors 2E and 2F of the lower traveling body 2 are configured.

  The plurality of hydraulic pilot valves 27, 27 are connected to the hydraulic pilot portions of the control valves 26A to 26F. The hydraulic pilot valves 27 and 27 are constituted by, for example, four pressure reducing valves 27A to 27D. Here, for example, the hydraulic pilot valve 27 located on the left side in FIG. 4 is connected to the left operation lever 10A and connected to the turning control valve 26A and the arm control valve 26B.

  For example, when the left control lever 10A is tilted forward, backward, left, or right, the pilot corresponding to the lever operation amount is supplied from the left hydraulic pilot valve 27 to the swing control valve 26A or the arm control valve 26B. The pressure is output, and the corresponding control valves 26A and 26B are switched. Thereby, the turning of the upper turning body 4 and the up-and-down movement of the arm 5C can be performed.

  On the other hand, the hydraulic pilot valve 27 located on the right side is connected to the right operation lever 10B and connected to the boom control valve 26C and the bucket control valve 26D. When the right operating lever 10B is tilted, the boom control valve 26C or the bucket control valve 26D is switched by the right hydraulic pilot valve 27, and the boom 5B and the bucket 5D can be operated.

  Further, the central hydraulic pilot valve 27 is connected to the left and right operation levers / pedals 11A and 11B, and is connected to the left travel control valve 26E and the right travel control valve 26F. When the operation lever / pedal 11A, 11B is tilted, the left traveling control valve 26E or the right traveling control valve 26F is switched by the central hydraulic pilot valve 27, and the vehicle can travel.

  A pilot switching valve (pilot cut solenoid valve) 28 that constitutes a locking device together with the lock lever 13 and the like is provided in the middle of the pilot line 25 (between the pilot hydraulic pump 24 and the hydraulic pilot valve 27) so as to be opened and closed. ing. The pilot switching valve 28 switches between permitting and prohibiting the supply of pilot pressure to the control valve device 26 (control valves 26A to 26F), that is, switching on (opening) and shutting off (closing) the pilot pressure oil.

  Here, the pilot switching valve 28 permits the driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A when the lock lever 13 is in the unlocked position. On the other hand, the pilot switching valve 28 prohibits the driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A when the lock lever 13 is in the locked position. Further, as will be described later, when the portable key 51 is outside the authenticable range of the wireless authentication device 52 even when the lock lever 13 is in the unlocked position, the pilot switching valve 28 is hydraulic actuators 5E, 5F, 5G, 5H, The driving of 2E, 2F, 3A is prohibited.

  As shown in FIG. 4, the pilot switching valve 28 is constituted by, for example, an electromagnetic pilot type three-port two-position switching valve. As shown in FIGS. 4 and 5, the pilot switching valve 28 includes an electromagnetic pilot portion 28 </ b> A that is energized with the vehicle battery 31 via a PC relay 42 described later, and a return spring 28 </ b> B. The pilot switching valve 28 is switched between the supply position (a) and the cutoff position (b) in accordance with ON (closed) / OFF (open) of the PC relay 42. Thus, the pilot switching valve 28 is configured to indirectly supply and shut off the pressure oil to the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A using the pilot pressure.

Specifically, when the PC relay 42 is ON (closed), by energizing the electromagnetic pilot portion 2 8 A is performed, the pilot changeover valve 28 is held in supply position (a). In this case, the pilot pressure is supplied from the pilot hydraulic pump 24 to each hydraulic pilot valve 27, and the operator operates the control lever 10A, 10B and the control lever / pedal 11A, 11B, thereby controlling the control valve device 26 (control valve). 26A to 26F) can be switched to drive the desired hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, 3A. That is, the operation of the working device 5, the turning operation of the upper turning body 4, and the running operation of the lower traveling body 2 are possible.

On the other hand, when the PC relay 42 is OFF (open), the energization to the electromagnetic pilot portion 2 8 A is stopped, and the pilot switching valve 28 is switched to the cutoff position (b) by the return spring 2 8 B. In this case, the pilot pressure supplied to each hydraulic pilot valve 27 is shut off, and the control valve device 26 (control valves 26A to 26F) is held in the neutral position. As a result, the supply of pressure oil to the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A is cut off, and the operation of the working device 5, the turning operation of the upper turning body 4, and the running operation of the lower traveling body 2 are performed. It becomes impossible.

  Next, the configuration of the electric circuit of the excavator 1 will be described with reference to FIG.

  In FIG. 5, a battery 31 serves as a power source for electric devices including the engine 15. More specifically, the battery 31 is an electric device for driving (driving) the engine 15, for example, a starter motor 16 provided in the engine 15, a fuel injection device (injector), various sensors, and further engine control. It serves as a power source for the unit 43 (hereinafter referred to as ECU 43). In addition to this, the battery 31 includes various electrical devices mounted on the hydraulic excavator 1, such as a first electrical component 37, a second electrical component 40, a monitor device 47, a vehicle body controller 48, an authentication controller 55, and the like. The power source of

  Here, the starter motor 16 is connected to the battery 31 via a slow blow fuse (SBF) 32 (hereinafter referred to as an SB fuse 32) and a starter relay 33 to form a starter circuit. The starter relay 33 is connected to the battery 31 via an SB fuse 32, a C fuse 34, a C relay 35, and a C fuse 36A in the fuse box 36, thereby forming a C relay circuit.

  The C relay 35 is switched ON (closed) and OFF (open) by a vehicle body controller 48 described later. In this case, when the C relay 35 is turned on (closed), a current flows through the ECU 43 and the starter relay 33. As a result, the ECU 43 turns on the starter relay 33 (closes), and the starter motor 16 and the battery 31 are energized (connected). As a result, the starter motor 16 rotates and the engine 15 can be started. When the engine 15 is started, the starter relay 33 is turned off (opened).

  A first electrical component (accessory electrical component, ACC electrical component) 37 is an SB fuse 32, an accessory fuse 38 (hereinafter referred to as ACC fuse 38), an accessory relay 39 (hereinafter referred to as ACC relay 39), It is connected via an ACC fuse 36B in the fuse box 36 to constitute an accessory circuit (ACC circuit). The first electrical component 37 corresponds to an electrical device that is energized (connected) to the battery 31 when the ACC relay 39 connected to the vehicle body controller 48 is ON (closed).

  The first electrical component 37 is not energized (not connected) to the battery 31 when the ACC relay 39 connected to the vehicle body controller 48 is OFF (open). As the first electrical component 37, for example, a part of the monitor device 47, a part of the controller (for example, a controller other than the vehicle body controller 48 and the authentication controller 55), an air conditioner (air conditioner), a wiper, and various solenoid valves Etc. The first electrical component 37 also includes electrical equipment necessary for driving the engine 15, for example, a fuel injection device (injector) of the engine 15.

  On the other hand, the second electrical component (battery direct-coupled electrical component, B electrical component) 40 is connected to the battery 31 via the SB fuse 32 and the B fuse 36C in the fuse box 36. The second electrical component 40 is an electrical device that is (always) connected to the battery 31 regardless of whether the C relay 35, ACC relay 39, and PC relay 42 connected to the vehicle body controller 48 are ON (closed) / OFF (open). It corresponds to. Examples of the second electrical component 40 include a part of the monitor device 47, a part of the controller (for example, the vehicle body controller 48 and the authentication controller 55), a horn, and a light.

  The pilot switching valve 28 is connected to the battery 31 via an SB fuse 32, a pilot cut fuse (PC fuse) 41, a PC relay 42, and a PC fuse 36 </ b> D in the fuse box 36. Here, the PC relay 42 is connected to the vehicle body controller 48. The vehicle body controller 48 switches ON (closed) / OFF (open) of the PC relay 42 in accordance with a signal of the lock switch 13A corresponding to the position of the lock lever 13.

  When the PC relay 42 is ON (closed), the pilot switching valve 28 and the battery 31 are energized (connected), and the pilot switching valve 28 is in the supply position (a). As a result, the pilot pressure can be supplied to the control valve device 26 (control valves 26A to 26F) via the operation levers 10A and 10B for operation and the operation levers and pedals 11A and 11B for travel. 5E, boom cylinder 5F, arm cylinder 5G, bucket cylinder 5H, turning hydraulic motor 3A, traveling hydraulic motors 2E, 2F) are permitted to be driven. On the other hand, when the PC relay 42 is OFF (open), the pilot switching valve 28 and the battery 31 are not energized (not connected), and the pilot switching valve 28 is in the cutoff position (b). In this case, the pilot pressure cannot be supplied to the control valve device 26 (control valves 26A to 26F), and the driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A is prohibited.

  The ECU 43 is a control device that controls the engine 15 (rotational speed control or the like), and is configured by, for example, a microcomputer. The ECU 43 is connected to various sensors and a fuel injection device (injector) provided in the engine 15. For example, the ECU 43 variably controls the fuel injection amount (fuel supply amount) into the cylinder of the engine 15 to operate the engine 15 at a rotational speed corresponding to the driving operation of the operator, the operating state of the vehicle, and the like. In this case, the ECU 43 controls the fuel injection amount of the fuel injection device based on, for example, a command of an engine speed instruction dial operated by an operator, a command from the vehicle body controller 48, and the like.

  Here, the ECU 43 is connected to the battery 31 via the SB fuse 32, the ECU fuse 36 </ b> E in the fuse box 36, and the main relay 44. The ECU 43 is connected to the starter relay 33, the alternator 46, and the ACC relay 39. The main relay 44 is switched ON (closed) / OFF (open) by the ECU 43. That is, when the ACC relay 39 is turned on (closed), a current flows from the ACC relay 39 to the ECU 43, and the ECU 43 turns the main relay 44 on (closed). As a result, the ECU 43 is energized (connected) with the battery 31. Further, the ECU 43 is connected to the monitor device 47, the vehicle body controller 48, the authentication controller 55, and the like via the communication line 45 to constitute a CAN (Control Area Network).

  The alternator 46 generates power by being driven by the engine 15. The alternator 46 supplies power to the first electrical component 37, the second electrical component 40, the ECU 43, the monitor device 47, the vehicle body controller 48, the authentication controller 55, etc., in addition to storing (charging) the battery 31. Here, the alternator 46 has a B terminal connected to the battery 31 via the SB fuse 32, a P terminal and an I terminal connected to the ECU 43, and an L terminal connected to the monitor device 47.

  The monitor device 47 is provided, for example, in the cab 8 of the hydraulic excavator 1 and notifies the operator who operates the hydraulic excavator 1 of the operating status of the hydraulic excavator 1 and the like. More specifically, the monitor device 47 notifies the operator of various state quantities such as the engine speed, fuel remaining amount, oil remaining amount, malfunction information of various devices including the engine 15 and hydraulic devices, warning information, and the like. Information to be displayed. Further, as will be described later, the monitor device 47 displays an authentication range of the wireless authentication device 52 and a setting screen for setting these.

  The vehicle body controller 48 is a control device (controller, control unit) that integrally manages the monitor device 47, the ECU 43, and the authentication controller 55, and includes, for example, a microcomputer. Here, the vehicle body controller 48 is connected between the battery 31 and the electric device based on the wireless authentication with the portable key (portable machine) 51 performed by the wireless authentication device 52 described later and the operation of the start switch 12 by the operator. It switches between energization (connection) and non-energization (non-connection).

  That is, the vehicle body controller 48 energizes (connects), de-energizes (non-connects) between the battery 31 and the first electrical component 37 based on the authentication of the wireless authentication device 52 and the operation of the start switch 12. The battery 31 and the starter motor 16 are switched between energization (connection) and non-energization (non-connection). In other words, the vehicle body controller 48 starts the engine 15 based on the result of authentication by the wireless authentication device 52 (whether it is in an authenticated state or an unauthenticated state) and whether or not the start switch 12 is operated. (Starting is permitted or prohibited).

  Next, the portable key 51 and the wireless authentication device 52 that perform wireless authentication will be described.

  A portable key (Key Fob) 51 as an authentication key (authenticator) is carried (carried) by an operator who operates (maneuveres) the excavator 1, for example. When the portable key 51 receives a request signal (authentication request signal) transmitted from the authentication controller 55 of the wireless authentication device 52 through the LF transmission antenna 53, the portable key 51 sends an authentication ID code (authentication signal, (Authentication number) is transmitted (transmitted, returned).

  For this purpose, the portable key 51 includes, for example, a receiver that receives a request signal, a transmitter that transmits an ID code to the authentication controller 55 (the RF receiving antenna 54), a microcomputer that controls them, and power to these. A battery to be supplied, a transponder or the like in which an ID code is set (not shown) are provided. When the battery of the portable key 51 runs out, the transponder is close to a transponder antenna (not shown) provided on the vehicle body and performs verification (authentication) of the ID code.

  As shown in FIG. 6, when the portable key 51 enters the transmission range (LF band) of the LF transmission antenna 53 connected to the authentication controller 55, the request signal (authentication request signal) transmitted from the LF transmission antenna 53. ) Is received by the receiver. Based on this reception, the portable key 51 transmits (replies) the authentication ID code set in the portable key 51 through the transmitter.

  On the other hand, a wireless authentication device 52 is provided on the upper swing body 4 (for example, in the cab 8) on the vehicle body side. The wireless authentication device 52 performs wireless authentication with the portable key 51. In this case, the wireless authentication device 52 transmits a request signal (authentication request signal) within the authenticable range (authentication range, authentication region), and for authentication returned from the portable key 51 based on the transmitted request signal. Authentication is performed when an ID code (authentication signal) is received. Here, the wireless authentication device 52 includes an LF transmission antenna 53 as a transmission antenna, an RF reception antenna 54 as a reception antenna, and an authentication controller 55.

  The LF transmission antenna 53 is connected to the authentication controller 55, and sends a request signal (authentication request signal) for transmitting an ID code (authentication signal) for authentication to the portable key 51 in a predetermined control cycle (for example, 0). .5 second period) is always transmitted (transmitted). The RF receiving antenna 54 is connected to the authentication controller 55 and receives the ID code transmitted (returned) from the portable key 51.

  As shown in FIG. 6, the transmission range (LF band) of the LF transmission antenna 53 is smaller than the reception range (RF band) of the RF reception antenna 54. The transmission range (LF band) of the LF transmission antenna 53 is, for example, about 1 m in diameter centered on the driver seat 9, and the reception range (RF band) of the RF reception antenna 54 is, for example, a diameter centered on the driver seat 9. It is about 10m. As will be described later, the transmission range (authentication range, authenticable range, authentication region) of the LF transmission antenna 53 is variably set within a range of, for example, a diameter of about 1 m to 5 m centered on the driver's seat 9 by the range setting switch 57. can do.

  The authentication controller 55 includes a microcomputer, and is connected to the vehicle body controller 48 via a communication line 45 and an analog signal line 56 that is a communication line different from the communication line 45. The authentication controller 55 is a control device (controller, control unit) that performs wireless authentication of the portable key 51. That is, the authentication controller 55 transmits a request signal to the authenticable range through the LF transmission antenna 53 at a predetermined control cycle (for example, 0.5 second cycle). In addition, the authentication controller 55 determines whether or not the ID code from the portable key 51 received through the RF receiving antenna 54 is a valid ID code, that is, the engine 15 preset in the authentication controller 55. It is authenticated (determined) whether or not the ID code is permitted to start. The authentication controller 55 constantly outputs the authentication result (determination result) to the vehicle body controller 48 at a predetermined control cycle (for example, 0.5 second cycle).

  For example, when receiving a valid ID code from the portable key 51 through the RF receiving antenna 54, the authentication controller 55 determines that the authentication is correct. In this case, the authentication controller 55 indicates that there is a portable key 51 that transmits a valid ID code within the transmission range of the LF transmission antenna 53 (LF band in FIG. 6) (correct authentication: the portable key 51 can be authenticated). Is output to the vehicle body controller 48 (for example, via the communication line 45). On the other hand, when the authenticating controller 55 has not received a valid ID code (including when an invalid ID code is received), the authentication controller 55 determines that the authentication has not been performed. In this case, the authentication controller 55 indicates that there is no portable key 51 that transmits a valid ID code within the transmission range of the LF transmission antenna 53 (unauthenticated: the portable key 51 is not within the authenticable range), It outputs to the vehicle body controller 48 (for example, via the communication line 45).

  The vehicle body controller 48 turns the ACC relay 39 ON (closed) / OFF (open) and the C relay 35 ON (closed) / OFF (based on the authentication result of the authentication controller 55 and whether or not the start switch 12 is operated. Open). For this purpose, the vehicle body controller 48 includes, for example, a microcomputer and is connected to the authentication controller 55, the start switch 12, the lock switch 13A, the ACC relay 39, the C relay 35, the PC relay 42, and the like. Further, a range setting switch 57 described later is connected to the vehicle body controller 48. The vehicle body controller 48 has a storage unit (not shown) including a ROM, a RAM, and the like. In this storage unit, in addition to a processing program for starting / stopping the engine 15, a later-described FIG. A processing program for switching the pilot switching valve 28, a processing program for setting the authentication range shown in FIG. 8, and the like are stored (stored).

  The vehicle body controller 48 confirms the authentication result of the authentication controller 55 (whether the authentication is normal or unauthenticated), whether or not the start switch 12 is operated, and the position of the lock lever 13 by the lock switch 13A (whether it is the lock position). The ACC relay 39 is turned ON / OFF, the C relay 35 is turned ON / OFF, and the PC relay 42 is turned ON / OFF based on whether or not the lock release position is reached.

  Here, when the vehicle body controller 48 turns off the ACC relay 39 and also turns off the C relay 35, the engine 15 is stopped and the electrical equipment (the first electrical component 37 and the starter motor 16) is not energized (non-energized). Connection) state, that is, “engine stop / energization OFF”.

  The vehicle body controller 48 turns on the ACC relay 39 and turns on the C relay 35 from the “engine stopped / energized off” state, and then turns off the C relay 35 (after driving the engine 15). Is driven, and the electrical device (first electrical component 37) is in a state of energization (connection), that is, “engine drive / energization ON”.

  On the other hand, when the vehicle body controller 48 turns on only the ACC relay 39 from the “engine stopped / energized OFF” state, the engine 15 is stopped and the electrical device (first electrical component 37) is energized (connected). The state, that is, “engine stop / energization ON” can be set.

  In the case of “engine stop / energization OFF”, the vehicle body controller 48 indicates that the portable key 51 is within the authenticable range (LF band), the lock lever 13 is in the lock position (raised position), and the start switch 12 is When operated, the engine is switched from “engine stop / energization OFF” to “engine drive / energization ON”. That is, when the lock lever 13 is switched to the lock position and the wireless authentication device 52 performs authentication using the portable key 51, the vehicle body controller 48 determines that the authentication result is normal authentication, and the engine by the start switch 12 Allow 15 starts. When the start switch 12 is operated in this state, the vehicle body controller 48 turns on the C relay 35, transmits an engine start signal to the ECU 43, and starts the engine 15. Thus, if the lock lever 13 is in the locked position and the portable key 51 is within the authenticable range, the operator can start the engine 15 only by operating the start switch 12.

  On the other hand, in the case of “engine drive / energization ON”, the vehicle body controller 48 switches from “engine drive / energization ON” to “engine stop / energization OFF” when the start switch 12 is operated. That is, the vehicle body controller 48 stops the engine 15 when the start switch 12 is operated while the engine 15 is being driven.

  Further, the vehicle body controller 48 turns on / off the PC relay 42 on the basis of the authentication result of the wireless authentication device 52 and the ON (closed) / OFF (open) of the lock switch 13A corresponding to the position of the lock lever 13. Turn OFF (open). Specifically, when the position of the lock lever 13 is the locked position, that is, when the lock switch 13A is OFF (open), the PC relay 42 regardless of the authentication result of the wireless authentication device 52 (regardless of whether it is authentic or unauthenticated). Is turned OFF (open), and the drive of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A is prohibited. That is, when the position of the lock lever 13 is the lock position, the vehicle body controller 48 turns off (opens) the PC relay 42 and sets the pilot switching valve 28 to the cutoff position (b).

On the other hand, by the operation of an operator, the lock lever 13 is switched et al is in the unlocked position, i.e., the lock switch 13A is ON (closed), and further, when the mobile key 51 is within the authentication range of the wireless authentication device 52 The vehicle body controller 48 permits driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A. That is, when the lock lever 13 is in the unlocked position and the authentication of the wireless authentication device 52 is normal authentication, the vehicle body controller 48 turns on the PC relay 42 and closes the pilot switching valve 28 at the supply position ( a).

  On the other hand, even if the lock lever 13 is switched to the unlock position, when the portable key 51 is outside the authenticable range of the wireless authentication device 52 (when not within the authenticable range), the vehicle body controller 48 Driving of the actuators 5E, 5F, 5G, 5H, 2E, 2F, 3A is prohibited. That is, the vehicle body controller 48 turns off (opens) the PC relay 42 and turns off the pilot switching valve 28 when the authentication of the wireless authentication device 52 is unauthenticated even when the lock lever 13 is in the unlock position. b).

  Here, the authentication controller 55 transmits a request signal over a predetermined authentication range via the LF transmission antenna 53. In this case, the authentication range (transmission range of the LF transmission antenna 53) can be variably set by a specific person (for example, a service person) who performs maintenance or the like of the excavator 1. For this purpose, the vehicle body controller 48 is connected to a range setting switch 57 as range setting means for variably setting the authentication range (output) of the wireless authentication device 52 (LF transmission antenna 53).

  The authentication range is set by, for example, displaying the authentication range setting screen on the monitor device 47 by the range setting switch 57, and enlarging / reducing the authentication range (for example, the diameter centered on the driver's seat 9) displayed on this screen ( Increase / decrease). In this case, expansion / reduction of the authentication range can be performed, for example, by changing the strength (output) of the radio wave of the LF transmission antenna 53.

  In the embodiment, the wireless authentication device 52 can set an authenticable range as an authentication range to a basic range and an extended range wider than the basic range. As shown in FIG. 9, the normal authentication range in which the driving operation is performed can be a basic range, for example, a range of about 1 m in diameter with the driver seat 9 as the center. In this case, if the lock lever 13 is in the unlocked position and the operator holding the portable key 51 is seated in the driver's seat 9 (in the cab 8), the hydraulic actuators 5E, 5F, 5G, 5H, Driving of 2E, 2F, and 3A is permitted.

  On the other hand, even if the lock lever 13 is switched to the unlocked position, if the operator holding the portable key 51 leaves the driver's seat 9 (not in the cab 8), the hydraulic actuators 5E, 5F, 5G, 5H, 2E, Driving of 2F and 3A is prohibited. Here, the basic range can be selected from the ranges (A) to (I) listed below, for example. The basic range is most preferably set strictly so as to be within the following ranges (A) to (I). However, depending on the performance of the LF transmitting antenna 53, the directivity of radio waves, etc., the authentication range may be allowed to be slightly expanded or reduced. That is, if the excavator 1 is within a range in which it is possible to prevent other people than the operator from moving, the range (A) to (I) listed below is enlarged or reduced (for example, within 0.5 m). Enlargement or reduction) is allowed.

(A) The range in the upper and lower directions is a range A (FIG. 1) above the lower end of the upper swing body 4 (or the upper end of the lower traveling body 2) and below the upper end of the cab 8, or this Within range.
(B) The range in the left and right directions is set to the range of the full width B (FIG. 2) of the lower traveling body 2 or within this range.
(C) The range in the front and rear directions is the range of the full length C (FIG. 2) of the lower traveling body 2 or within this range.
(D) The range of the left, right direction, front, and rear direction is set to the turning range of the upper swing body 4 (circle of the turning radius R in FIG. 2) or within this range.
(E) Up, down, left, right, and front and rear ranges are defined as the range of the cab 8A of the cab 8 (cab 8) or within that range (in the cab 8A, cab 8). To do.
(F) The range of the left, right direction, front, and rear direction is the range of a circle with a diameter of 2 m centered on the driver's seat 9 or within this range (inside the circle).
(G) The range in the left, right direction, and front and rear directions is a circle of 1 m in diameter centered on the driver's seat 9 or within this range (inside the circle).
(H) The range in the upper and lower directions is the range above the driver's seat 9 (the seat surface or the bottom surface thereof) and below the ceiling of the cab 8 or within this range.
(I) The range of the left, right direction, front, and rear direction is set to the range of the circumscribed circle of the seat surface of the driver's seat 9, or within this range (inside the circle).

  In this case, the basic ranges of the left, right direction and the front and rear directions can be the maximum ranges (A), (B) and (C), and the minimum range is (D) to (I) (One or more) can be selected. The maximum range is selected from (D) to (G) (one or more), and the minimum range is selected from (D) to (G) (1 or more) smaller than this. be able to. 1 and 2 show a case where the basic range 61 is (E). 1 and 2, the basic range 61 is simply shown in a substantially rectangular shape. However, as long as the range (one or more) selected from the above (A) to (I) is satisfied, a circular shape, a substantially rectangular shape, a substantially polygonal shape, a compound circular shape (in a top view or a side view) The shape may be a range of various shapes such as a shape obtained by combining a plurality of circles), a sector shape, or a shape obtained by combining these shapes. Furthermore, it may be a range separated into a plurality. In any case, the specification, performance, and radio wave characteristics of the LF transmission antenna 53 are set so that the basic range 61 falls within the range (one or more) selected as the basic range from the above (A) to (I). Set the mounting position.

  On the other hand, when performing maintenance on the hydraulic excavator 1, the authenticable range is set to an extended range, that is, a range larger than (A), (B), and (C) that is the maximum range of the basic range. For example, the authenticable range is a range of about 5 m in diameter with the driver's seat 9 as the center. More specifically, the extended range can be selected from the ranges (J) to (O) listed below, for example.

(J) The range in the upward and downward directions is set above the lower end of the lower traveling body 2 and below the upper end of the cab 8 or within this range.
(K) The range in the upper and lower directions is above the lower end of the lower traveling body 2 and below the position K higher than the upper end of the cab 8 by the height dimension of the lower traveling body 2 (FIG. 1), Or within this range.
(L) The range in the left and right directions is set to a range larger than the full width B of the lower traveling body 2 (for example, full width B + 1m) or within this range.
(M) The range in the left and right directions is set to a range larger than the total length C of the lower traveling body 2 (for example, the total width C + 1m) or within this range.
(N) All of the upper swing body 4, the lower traveling body 2, and the work device 5 with the arm 5 </ b> C of the work device 5 folded to the lower side of the boom 5 </ b> B in the left, right direction, and front and rear ranges. Is within the range N1, N2 (FIG. 2) or within this range.
(O) The range corresponding to the maximum value of radio wave output permitted by law or within this range.

  In this case, for the extended range in the left, right direction, and front and rear directions, the maximum range can be (O), and the minimum range can be selected from (J) to (N) (one or more). The extended range only needs to be greater than or equal to the basic range and partly larger than the basic range. FIGS. 1 and 2 show the case where the upper and lower ranges are (K) and the left, right and front and rear ranges are (N). 1 and 2, the extended range 62 is simply illustrated in a substantially rectangular shape as in the basic range 61. However, if the range selected as the expansion range from the above (J) to (O) is satisfied, a circular shape, a substantially rectangular shape, a substantially polygonal shape, a composite circular shape (a plurality of circles are combined) in a top view or a side view. Shape), a sector shape, and a combination of these shapes. Furthermore, it may be a range separated into a plurality. In any case, the specification, performance, and radio wave characteristics of the LF transmission antenna 53 are set so that the extended range 62 falls within the range (one or more) selected as the extended range from the above (J) to (O). Set the mounting position.

  When changing the authenticable range from the basic range 61 to the extended range 62, the range setting switch 57 causes the monitor device 47 to display an authentication range setting screen. This authentication range setting screen is preferably displayed only by a specific person (for example, a service person) who performs maintenance or the like of the excavator 1, for example. In other words, setting the authenticable range from the basic range 61 to the extended range 62 requires a setting change restriction means, for example, input of a password, connection of a maintenance computer, etc. so that only a specific person can perform it. It can be. A specific person who performs maintenance or the like displays the authentication range setting screen on the monitor device 47 by inputting a password or the like, and changes the authentication range displayed on the screen to the extended range 62.

  In this case, for example, the authenticable range is changed to the extended range in an environment where use by anyone other than the person holding the portable key 51 is prohibited, such as in a repair shop. Thereby, if the person (for example, service person) who performs maintenance of the hydraulic excavator 1 has the portable key 51, the engine 15 is driven and the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, 3A are driven. Necessary work can be performed around the hydraulic excavator 1 in a state where the driving of the hydraulic excavator 1 is permitted. For example, inspection in the engine room, inspection in the radiator room, replacement of the bucket 5D of the work device 5 (replacement of the front attachment), slinging of a suspended load, and the like can be performed. 7 and 8 executed by the vehicle body controller 48, that is, the opening / closing control processing (FIG. 7) of the pilot switching valve 28 and the authentication range setting processing (FIG. 8) will be described later.

  The hydraulic excavator 1 according to the embodiment has the above-described configuration, and the operation thereof will be described next.

  The operator of the excavator 1 carries the portable key 51 and gets on the cab 8 of the upper swing body 4, for example. When the operator in the cab 8 is seated in the driver's seat 9 and presses the start switch 12 with the lock lever 13 in the locked position, the vehicle body controller 48 turns on the ACC relay 39, and the C relay 35 is also turned on. Turns on. Thereby, energization to the first electrical component 37 and the starter motor 16 is started. As a result, the starter motor 16 rotates and the engine 15 starts. After the engine 15 is started, the vehicle body controller 48 turns off the C relay 35.

  When the engine 15 is started, the hydraulic pump 21 is driven by the engine 15. When the operator operates the lock lever 13 from the locked position to the unlocked position, the hydraulic actuators (swing cylinder 5E, boom cylinder 5F, arm cylinder 5G, bucket cylinder 5H, swing hydraulic motor 3A, traveling hydraulic motors 2E, 2F) are driven. Allowed.

  For example, the lower traveling body 2 can be moved forward or backward by operating the operating levers / pedals 11A and 11B for traveling. When the operator operates the operation levers 10A and 10B for work, the work device 5 can be moved up and down to perform excavation work of earth and sand. In this case, since the small excavator 1 has a small turning radius by the upper swing body 4, for example, even in a narrow work site such as an urban area, a side ditching operation or the like can be performed while the upper swing body 4 is driven to rotate.

  Here, the operator may move the lock lever 13 from the unlock position to the lock position and leave the excavator 1 while the engine 15 is driven. In this case, if the operator who has the portable key 51 goes out of the cab 8, the portable key 51 falls outside the authenticable range of the wireless authentication device 52 (out of the basic range 61). In this state, even if a person other than the operator who does not have the portable key 51 gets on the hydraulic excavator 1 with the engine 15 driven and operates the lock lever 13 to the unlock position, the hydraulic actuators 5E, 5F, 5G , 5H, 2E, 2F, 3A can be prohibited.

  On the other hand, when the operation is completed and the operator presses the start switch 12, the vehicle body controller 48 turns off the ACC relay 39. Thereby, the power supply to the first electrical component 37 is cut off, and the engine 15 is stopped.

  Next, processing performed by the vehicle body controller 48 will be described with reference to the flowcharts of FIGS. 7 is a process for switching control of the pilot switching valve 28, and FIG. 8 is a process for setting the authentication range.

  First, the process of FIG. 7 will be described. When the processing operation of FIG. 7 starts when the ACC relay 39 is turned on, that is, when the engine is driven and energized, the lock lever 13 is moved to the lowered position (unlocked position) in Step 1. It is determined whether or not. This determination can be made based on the signal (ON / OFF) of the lock switch 13A. If “NO” in step 1, that is, if it is determined that the lock lever 13 is not in the lowered position (lock release position), in other words, in the raised position (lock position), the process proceeds to step 2. In step 2, the PC relay 42 is turned off (opened), and the pilot switching valve 28 is set to the cutoff position (b). Thereby, the driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, 3A is prohibited. When the pilot switching valve 28 is set to the shut-off position (b) in step 2, the process returns to the start via return, and the processes in and after step 1 are repeated.

  On the other hand, if “YES” in step 1, that is, if it is determined that the lock lever 13 is in the lowered position (lock release position), the process proceeds to step 3. In step 3, it is determined whether or not the portable key 51 is within the response (within the authenticable range) of the LF transmission antenna 53. This determination can be made based on an authentication result that is constantly output from the authentication controller 55 to the vehicle body controller 48 at a predetermined control cycle.

  That is, when the portable key 51 is within the reaction of the LF transmission antenna 53, an authentication ID code is transmitted (returned or transmitted) from the portable key 51 based on a request signal transmitted from the LF transmission antenna 53. When receiving the ID code returned from the portable key 51 via the RF receiving antenna 54, the authentication controller 55 determines whether or not the received ID code is a valid ID code.

  At this time, if the authentication controller 55 is a valid ID code, the authentication controller 55 outputs to the vehicle body controller 48 an authentication result indicating that the authenticated mobile key 51 is within the authenticable range, that is, authentic authentication. The authenticable range (the range in which the request signal is transmitted) is set by the process shown in FIG. On the other hand, if a valid ID code is not received, the authentication controller 55 outputs to the vehicle body controller 48 an authentication result indicating that the portable key 51 is not within the authenticable range, that is, unauthenticated.

  If “YES” in step 3, that is, if it is determined that the portable key 51 is within the reaction of the LF transmission antenna 53 (correct authentication), the process proceeds to step 4. In step 4, the PC relay 42 is turned ON (closed), and the pilot switching valve 28 is set to the supply position (a). Thereby, driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, 3A is permitted. On the other hand, if it is determined in step 3 that “NO”, that is, the portable key 51 is not within the reaction of the LF transmission antenna 53 (unauthenticated), the process proceeds to step 2. As a result, even when the lock lever 13 is in the lowered position (unlock position), the mobile key 51 is out of the authenticable range of the LF transmission antenna 53, so that the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, 3A Driving is prohibited.

  Next, the process of FIG. 8 will be described. The process of FIG. 8 is a process performed prior to the process of step 1 of FIG. When the processing operation of FIG. 8 starts, it is determined in step 11 whether or not the authentication range is set by the range setting switch 57. If “NO” in step 11, that is, if it is determined that the authentication range is not set by the range setting switch 57, the process proceeds to step 12 where the authentication range is set as an initial value (basic range) and the processing of FIG. finish. On the other hand, if “YES” in step 11, that is, if it is determined that the authentication range is set (changed) to the extended range by the range setting switch 57, the process proceeds to step 13 to change the authentication range to the extended range. . That is, the vehicle body controller 48 outputs a command to the authentication controller 55 to change the authentication range from the basic range to the extended range. Thereby, the strength (output) of the radio wave of the LF transmission antenna 53 is changed (adjusted) to the extended range. FIG. 9 shows an example of setting the authentication range.

  Thus, according to the embodiment, even when the engine 15 is being driven, the operator can hold the portable key 51 to prevent other persons other than the operator from moving the excavator 1.

  (1). That is, according to the embodiment, even when the lock lever 13 is switched to the unlocked position, the vehicle body controller 48 is in a position where the portable key 51 is out of the authenticable range of the wireless authentication device 52, the hydraulic actuators 5E, 5F, The driving of 5G, 5H, 2E, 2F, 3A is prohibited. As a result, even if the operator (person) holding the portable key 51 moves away from the excavator 1 while the engine 15 is being driven, the portable key 51 is outside the authenticable range of the wireless authentication device 52, so that Others cannot move the excavator 1. Thereby, it is possible to suppress movement of the excavator 1 by a person other than the operator who has the portable key 51.

  (2). According to the embodiment, the authenticable range (basic range) of the wireless authentication device 52 can be set to the above (A), (B), and (C) that are the maximum range. In this case, even if the operator carrying the portable key 51 leaves the driver's seat 9 while the engine 15 is being driven, if the operator gets off the upper swing body 4 and goes outside the lower traveling body 2, The portable key 51 is out of the authenticable range of the wireless authentication device 52. In this state, even if someone other than the operator who does not have the portable key 51 gets on the hydraulic excavator 1 where the engine 15 is driven and lowers the lock lever 13 to the unlocked position (lowered position), the portable key 51 is held. The driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, 3A can be prohibited until the operator returns.

  (3). According to the embodiment, the authenticable range (its basic range) of the wireless authentication device 52 can be set to the above (D). In this case, even if the operator holding the portable key 51 leaves the driver's seat 9 while the engine 15 is being driven, if the operator gets off the upper swing body 4, the portable key 51 can be authenticated by the wireless authentication device 52. Get out. Also in this case, the driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A can be prohibited until the operator holding the portable key 51 returns.

  (4). According to the embodiment, the minimum range is set to (E) and the maximum range is set to (A), (B), and (C) as the authenticable range (the basic range) of the wireless authentication device 52. can do. In this case, even if the operator holding the portable key 51 moves away from the driver's seat 9 while the engine 15 is being driven and is in the minimum range, if the operator leaves the driver's cab 8A, When the user exits 4 and goes outside the lower traveling body 2, the portable key 51 falls outside the authenticable range of the wireless authentication device 52. Also in this case, the driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A can be prohibited until the operator holding the portable key 51 returns.

  (5). According to the embodiment, the range setting switch 57 can variably set the authenticable range of the wireless authentication device 52 to the basic range 61 and the extended range 62. Here, when the basic range 61 is set to (E) and is set to the basic range 61, when the operator holding the portable key 51 leaves the cab 8A, the portable key 51 is connected to the wireless authentication device 52. Out of the authentication range. When the basic ranges are (A), (B), and (C) and the basic range 61 is set, the operator holding the portable key 51 gets off the upper swing body 4 and travels in the lower part. If it goes outside the body 2, the portable key 51 is out of the authenticable range of the wireless authentication device 52. Thereby, the driving of the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A can be prohibited until the operator holding the portable key 51 returns.

  On the other hand, in an environment where use by anyone other than the person holding the portable key 51 is prohibited, such as in a repair shop, the authenticable range of the wireless authentication device 52 can be set to an extended range. For example, when the extended range 62 is set to (N) and the extended range 62 is set (changed), the person who has the portable key 51 (for example, a serviceman at a repair shop) turns on the engine 15 of the excavator 1. Necessary work such as maintenance can be performed around the hydraulic excavator 1 in a state where the hydraulic actuators 5E, 5F, 5G, 5H, 2E, 2F, and 3A are allowed to be driven.

  In the above-described embodiment, all of the upper swing body 4, the lower traveling body 2, and the work device 5 enter the expanded range 62 in a state where the arm 5C of the work device 5 is folded below the boom 5B. The case where the ranges are N1 and N2 has been described as an example. However, the present invention is not limited to this. For example, as in the first modification shown in FIGS. 10 and 11, the extended range 62 ′ is swung upward while the arm 5 C of the working device 5 is extended. The range in which all of the body 4, the lower traveling body 2, and the work device 5 are included, in other words, the range of the work range of the excavator 1 (circle of work diameter S) may be used.

  In embodiment mentioned above, the case where it applied to the excavator 1 of the cab specification provided with the cab 8 as a building in the upper revolving body 4 was demonstrated as an example. However, the present invention is not limited to this. For example, as in the second modification shown in FIG. 12, a canopy-spec hydraulic excavator 1 including a canopy 71 as a building that covers at least the upper side of the driver's seat 9. You may apply to.

  In the above-described embodiment, the case where the range setting switch 57 is configured to variably set the authenticable range of the wireless authentication device 52 to the basic range 61 and the extended range 62 has been described as an example. However, the present invention is not limited to this, and for example, the authenticable range may be set to either the basic range or the expanded range. In other words, the range that can be selected from the above (A) to (O) may be used, and the authenticable range may be fixed (unchangeable). Further, in the embodiment, the authenticable range is variably set in two stages. However, it may be configured so that it can be set in three or more stages.

  In the above-described embodiment, the hydraulic excavator 1 is applied to a rear ultra-small turning hydraulic excavator in which the turning radius R of the upper turning body (counterweight 14) is within the vehicle width of the lower traveling body 2. Explained with an example. However, the present invention is not limited to this. For example, in a state where the work device is raised to the upper swing body side (traveling posture), all the turning radii of the upper swing body and the work device are within the vehicle width of the lower travel body. You may apply to the ultra-small turning type hydraulic shovel which fits (for example, refer Unexamined-Japanese-Patent No. 11-336112). In this case, the authenticable range is substantially the same in the range of the turning radius of the upper swing body and the range in which all of the lower traveling body, the upper swing body, and the work device are included.

  In the above-described embodiment, the case where the switching valve that is switched according to the operation of the lock lever 13 is the pilot switching valve 28 provided in the pilot pipeline 25 has been described as an example. However, the present invention is not limited to this. For example, a switching valve that can be switched according to the operation of the lock lever may be provided in the main pipeline. In other words, as long as the configuration of the lock device can be switched between a lock position where the drive of the hydraulic actuator is prohibited and a lock release position where the drive of the hydraulic actuator is allowed, various lock mechanisms can be employed.

  In the above-described embodiment, the hydraulic actuators that prohibit driving when the lock lever 13 is in the locked position (raised position) are the hydraulic actuators related to all work and travel (swing cylinder 5E, boom cylinder 5F, arm cylinder 5G, bucket). The case where the cylinder 5H, the swing hydraulic motor 3A, and the traveling hydraulic motors 2E and 2F) are described as an example. However, the present invention is not limited to this, and for example, hydraulic actuators that prohibit driving can be selected according to the specifications of a hydraulic excavator (construction machine).

  In the above-described embodiment, the electrical component (electric device) that switches between energization and de-energization with the battery 31 in accordance with ON (closed) / OFF (open) of the ACC relay 39 is the first electrical component 37, and C The electrical component (electrical device) that switches between energization and de-energization in response to ON (closed) / OFF (open) of the relay 35 is the starter motor 16 of the engine 15, and the ACC relay 39 is ON (closed) / OFF (open). Regardless of the above, the case where the electrical component (electrical device) always connected to the battery 31 is the second electrical component 40 has been described as an example.

  However, the present invention is not limited to this. For example, an electrical component (electrical device) other than the starter motor 16 can be energized and de-energized with the battery according to ON (closed) / OFF (open) of the ACC relay. It is good also as a 1st electrical equipment (electric equipment) to switch. Further, the various devices corresponding to the first electrical component 37 and the various devices corresponding to the second electrical component 40 in the embodiment are merely examples, and the specifications and options of the hydraulic excavator (construction machine) It can be appropriately changed according to the electrical equipment (electrical equipment). That is, whether to use the first electrical component or the second electrical component can be selected according to the electrical component (electric device) mounted on the hydraulic excavator (construction machine).

  In the above-described embodiment, the engine-type hydraulic excavator 1 including the engine 15 as a prime mover serving as a drive source (power source) of the hydraulic pump 21 has been described as an example. However, the present invention is not limited to this. For example, a hybrid hydraulic excavator (hybrid construction machine) including an engine and an assist generator motor (a generator motor, a generator, and an electric motor) as a prime mover may be used. In this case, the assist power generation motor may be an engine starter motor. Furthermore, the motor may be an electric motor (electric motor).

  In the above-described embodiment, the case where the small excavator 1 is mounted has been described as an example. However, the construction machine according to the present invention is not limited to this, and may be applied to, for example, medium or larger hydraulic excavators. In addition, the present invention can be widely applied to various construction machines such as a hydraulic excavator, a wheel loader, a forklift, a hydraulic crane, and the like having a wheel type lower traveling body.

1 Excavator (construction machine)
2 Lower traveling body (car body)
4 Upper swing body (car body)
5 Working device 5E Swing cylinder (hydraulic actuator)
5F Boom cylinder (hydraulic actuator)
5G arm cylinder (hydraulic actuator)
5H Bucket cylinder (hydraulic actuator)
8 Cab (building)
9 Driver's seat 12 Start switch 13 Lock lever (lock device)
15 engine (motor)
21 Hydraulic pump 28 Pilot switching valve (locking device)
48 Car body controller 51 Portable key 52 Wireless authentication device 57 Range setting switch (range setting means)

Claims (5)

And the vehicle body with luck Utateseki,
A prime mover provided in the vehicle body and serving as a power source;
A hydraulic pump driven by the prime mover to supply hydraulic oil;
A hydraulic actuator driven by pressure oil supplied from the hydraulic pump;
A construction machine equipped with a lock is switched on and an unlocked position device to permit driving of the hydraulic actuator and a locking position for prohibiting the driving of the pre-Symbol hydraulic actuator,
A start switch for starting the prime mover;
A wireless authentication device for performing wireless authentication with a portable key provided in the vehicle body;
A vehicle body controller for starting the prime mover based on the operation of the start switch and authentication by the wireless authentication device;
The vehicle body controller
The prime mover is being driven, while the locking device is switched before kilo click release position, and wherein when the portable key is within the authentication range of the wireless authentication device of the hydraulic actuator Allow driving,
Even when the prime mover is being driven and the lock device is switched to the unlocking position, the prime mover is in a drive state when the portable key is outside the authenticable range of the wireless authentication device . construction machine characterized in that it makes prohibits driving of the hydraulic actuator remains. The vehicle body is composed of a self-propelled lower traveling body, and an upper revolving body having a building that is turnably mounted on the lower traveling body and covers the upper side of the driver's seat,
The authenticable range of the wireless authentication device is an upper and lower direction range above the lower end of the upper swing body and below the upper end of the building, and a left and right direction range as the lower part. The construction machine according to claim 1, wherein the entire width of the traveling body is set, and the range in the front and rear directions is set to the entire length of the lower traveling body. The vehicle body includes a self-propelled lower traveling body and an upper revolving body mounted on the lower traveling body so as to be capable of turning,
The construction machine according to claim 1, wherein an authenticable range of the wireless authentication device is set to a turning range of the upper turning body. The vehicle body is composed of a self-propelled lower traveling body, and an upper revolving body having a building that is turnably mounted on the lower traveling body and covers the upper side of the driver's seat,
The minimum range of the authenticable range of the wireless authentication device is the range of the cab of the building,
The maximum range of the authenticable range of the wireless authentication device is the range in the upper and lower directions, the range above the lower end of the upper swing body and below the upper end of the building, and the range in the left and right directions The construction machine according to claim 1, wherein the entire width of the lower traveling body is set, and the range in the front and rear directions is set to the entire length of the lower traveling body. A range setting means for variably setting the authenticable range of the wireless authentication device to a basic range and an extended range wider than the basic range;
The vehicle body includes a self-propelled lower traveling body and an upper revolving body mounted on the lower traveling body so as to be capable of turning and having a work device attached thereto,
The basic range includes a range in the upper and lower directions above the lower end of the upper revolving unit, a range in the left and right directions as a range of the full width of the lower traveling unit, and the front and rear directions. The range of the total length of the lower traveling body,
The construction machine according to claim 1, wherein the extended range is a range in which all of the lower traveling body, the upper swing body, and the work device are included.

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